Synonyms: 1,5-Methano-1H,3H,11H-furo[3,4-g]pyrano[3,2-b]xanthene-1-crotonaldehyde,6-ethoxy-3a,4,5,6,6a,7-hexahydro-a,3,3,11,11-pentamethyl-13-(3-methyl-2-butenyl)-7,15-dioxo-, stereoisomer(8CI); Isomorellin, ethoxydihydro- (7CI); 1,5-Methano-1H,3H,11H-furo[3,4-g]pyrano[3,2-b]xanthene,2-butenal deriv.; Isomoreollin